The article describes two experimental studies of the influence of subjective ideas about capabilities on the effectiveness in a sensorimotor task. Subjective ideas of effectiveness were varied by changing the perceived size of targets. Experiments were conducted
in the form of a computer game. Participants learned to accurately hit the center of the target, receiving feedback on the size of the error. The results of both experiments indicate increased control over the task when the participants work with an illusorily larger goal. This
is evidenced by a longer preparation time for the task. At the same time, in Experiment 2,
the greater accuracy of the sensorimotor task was also demonstrated if the participants
worked with an illusorily smaller goal. The results are discussed in the context of rethinking
an illusorily larger goal as being subjectively more complex.